From: Andi Kleen <ak@muc.de>
Date: Wed, 27 Jul 2005 18:43:34 +0000 (-0700)
Subject: [PATCH] x86_64: fix SMP boot lockup on some machines
X-Git-Tag: firefly_0821_release~42584^2~162
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=54264911ce8c3f4a9e7fc193bc78a85e04df7fa0;p=firefly-linux-kernel-4.4.55.git

[PATCH] x86_64: fix SMP boot lockup on some machines

Fixes boot up lockups on some machines where CPU apic ids don't start with
0

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/arch/x86_64/kernel/smpboot.c b/arch/x86_64/kernel/smpboot.c
index b969ee128728..e66edfa1f3b9 100644
--- a/arch/x86_64/kernel/smpboot.c
+++ b/arch/x86_64/kernel/smpboot.c
@@ -229,7 +229,7 @@ static __cpuinit void sync_master(void *arg)
 {
 	unsigned long flags, i;
 
-	if (smp_processor_id() != boot_cpu_id)
+	if (smp_processor_id() != 0)
 		return;
 
 	go[MASTER] = 0;